O-LevelBiologyRespiration5090/11 · May/June 2014 · Q181 Mark

What happens to the volume of the thorax and the air pressure in the lungs during breathing out?

Adecreases increases

Bdecreases remains constant

Cincreases increases

Dincreases remains constant

✓ Correct answer

A: decreases increases

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Topic: Respiration, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2014 Paper 1 Variant 1, question 18.

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